Bulb-manipulator.



BEST AVAILABLE COP No. 787,805. PATENTED APR; 18, 1905.

W H THOMPSON BULB MANIPULATOR;

APPLICATION FILED JUNE 25, 1904.

UNITED STATES WILLIAM H. THOMPSON,

OF ONE-HALF SYLVANIA.

' BEST AVAILABLE COP TO WILLIAM W. DRYDEN,

Patented April 18, 1905.

OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF PHILADELPHIA, PENN- BULB -IVIANIPULATOR.

SPECIFICATION forming part of Letters Patent No. 787,805, .dated April 18, 1905.

Application filed June 25, 1904. Serial No. 214,091. I

To all 11:71.01, it may concern:

Be it known that I, WILLIAM H. THOMP- SON, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Globe-Manipulating Devices, of which the following is a specification.

My invention has relation to a device for permitting of quickly inserting and remov ing incandescent-electrio-light bulbs into and from their sockets, and in such connection it relates to the particular construction and arrangement of such a device for the said purposes.

, The nature and scope of my invention will 1 be more fully understood fromthe following description, taken in connection with the ac- -com anying drawings, forming part hereof,

in w oh Figure 1 is an elevational view of a device of my invention embodying main features thereof and a broken section of the pole there for. Fig. 2 is a side device, showing the angular position that the gripping-fingers of the device may be caused to assume in certain instances for either inserting a bulb into or removing the same from its socket; and Fig. 3 is a vertical sectional view of the device, in broken section, showing detail construction and arrangement of main operative features thereof. Referring to the drawings, a is a pole or rod for the globe or bulb manipulating device, provided with an adjustable tightenin device I), having a locking-pawl 6, provide with a groove If and a tongue 1), adapted to traverse the slot 5 of this tightening device. (Z is a yoke-frame pivotally clamped, as shown, by means of a tightening-nut h, to the pole or rod a. The yoke-frame d is provided with a central transverse opening or seat (1 for a grooved pulley-wheel e and with an end opening d at. right angles to the pulley-seat to form a bearing for a shaft 0 carrying a series of gripping fingers c, mounted in said bearing. The pulley-wheel elevational view of the e is tightened or loosened on the shaft 0 by means of a set-screw (Z Throu h the yokeframe (1 is inserted a set-screw g For clamping the shaft 0 from the said frame. I Between the adjustable tightening device I b of the pole or rod a and the grooved pulleywheel e is an endless-cord connection f for permitting of the actuation of the pulley as required. I When the set-screw g is brought into firm engagement with the shaft 0 there is prevented the turning of the shaft by the pul eywheel e when the yoke-frame and ole occupy theposition as illustrated in Fig. 1, for I the reason that in such position inserting or removing of a bulb or globe from its socket is effected "simply by turning or revolving by hand the pole or rod a with the gripping-fingers in engagement'with the bulb or globe, while, on the other hand, when the yokeframe (1, with its shaft 0 and grip ing-fingers c, has been caused to assume Ere osition shown in Fig. 2, with the cord f taut etween the pulley-Wheel e and the adjustable tightening device I), by drawin on the cord the pulley-wheel e can be readily revolved and therewith the ripping fingers c rotated with a bulb or gIobe between them for either 7 inserting the bulb in its socket or for removing the same therefrom. In this instance it will be understood that the set-screw y will be brought out of engagement with the shaft 0 so as to permit of the free rotation ther y in the yoke-frame d. V

Having thus described the naturear 'ject of my invention, What I claim as and desire to secure by Letters Patent, -In a globe-manipulating device, the bination with a pole or rod, a yoke-f pivotally clamped to said rod, said yo frame having a central transverse opel or seat for a pulley-Wheel, and an end 01 ing at right angles to the pulley-seat form a bearing for a shaft carrying grippinggers mounted in said bearing, a groo pulley-wheel, and means for clamping pulley-wheel to its shaft and thereby r 2 BESTAVAILABLECOP} venting removal of the shaft from said yokemy signature in the presence of tivosuhscrib- 7 frame, of an adjustable tightening device on ing Witnesses.

the rod and an endless-cord connection between said pulley-Wheel and tightening de- THOMPSQN' vice, substantially as and for the purposes Vitnesses: described. J. WALTER DOUGLASS,

In testimony whereof I have hereunto set THOMAS M. SMITH. 

